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d137ab4783
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661 Commits

Author SHA1 Message Date
Chris Lattner
d137ab4783 Fix PR2553 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53715 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-17 06:07:20 +00:00
Matthijs Kooijman
d8b4d60490 Add a few cases to instcombine's extractvalue testcase. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53675 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-16 12:57:25 +00:00
Evan Cheng
be8efa54b6 Fix PR2296. Do not transform x86_sse2_storel_dq into a full-width store. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53666 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-16 07:28:14 +00:00
Chris Lattner
fdb19e5887 Fix PR2506 by being a bit more careful about reverse fact propagation when 
disproving a condition.  This actually compiles the existing testcase
(udiv_select_to_select_shift) to:

define i64 @test(i64 %X, i1 %Cond) {
entry:
	%divisor1.t = lshr i64 %X, 3		; <i64> [#uses=1]
	%quotient2 = lshr i64 %X, 3		; <i64> [#uses=1]
	%sum = add i64 %divisor1.t, %quotient2		; <i64> [#uses=1]
	ret i64 %sum
}

instead of:

define i64 @test(i64 %X, i1 %Cond) {
entry:
	%quotient1.v = select i1 %Cond, i64 3, i64 4		; <i64> [#uses=1]
	%quotient1 = lshr i64 %X, %quotient1.v		; <i64> [#uses=1]
	%quotient2 = lshr i64 %X, 3		; <i64> [#uses=1]
	%sum = add i64 %quotient1, %quotient2		; <i64> [#uses=1]
	ret i64 %sum
}



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53534 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-14 00:15:52 +00:00
Nick Lewycky
3ac9e109b2 Enhance analysis of srem. 
Remove dead code analyzing urem. 'urem' of power-of-2 is canonicalized to an
'and' instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53506 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-12 05:04:38 +00:00
Nick Lewycky
4bf1e59819 Add another optimization from PR2330. Also catch some missing cases that are 
similar.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53451 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-11 07:20:53 +00:00
Chris Lattner
85b5eb0505 Fix folding of icmp's of i1 where the comparison is signed. The code 
was using the algorithm for folding unsigned comparisons which is
completely wrong.  This has been broken since the signless types change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53444 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-11 04:20:58 +00:00
Chris Lattner
f299184565 Fix a bogus optimization: folding (slt (zext i1 A to i32), 1) -> (slt i1 A, true) 
This cause a regression in InstCombine/JavaCompare, which was doing the right
thing on accident.  To handle the missed case, generalize the comparisons based
on masked bits a little bit to handle comparisons against the max value. For 
example, we can now xform (slt i32 (and X, 4), 4) -> (setne i32 (and X, 4), 4)




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53443 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-11 04:09:09 +00:00
Chris Lattner
99672cb130 make this condition more precise. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53442 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-11 03:54:57 +00:00
Nick Lewycky
5dcc41f5b3 Fix overzealous optimization. Thanks to Duncan Sands for pointing out my error! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53393 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-10 05:51:40 +00:00
Nick Lewycky
9ee863ecc0 Fold (a < 8) && (b < 8) into (a|b) < 8 for unsigned less or greater than. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53282 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-09 07:29:11 +00:00
Nick Lewycky
d1f77bf931 Fold ((1 << a) & 1) to (a == 0). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53276 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-09 05:20:13 +00:00
Chris Lattner
2782ed1f14 Fix a broken test. Neither load is eliminable without changing the CFG. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53273 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-09 05:01:02 +00:00
Nick Lewycky
b4d1bc989e Reduce x - y to -y when we know the 'x' part will get masked off anyways. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53271 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-09 04:32:37 +00:00
Chris Lattner
895860e27b new testcase for PR2496 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53239 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-08 17:18:05 +00:00
Nick Lewycky
b8cd6a49b5 Fix missed optimization opportunity when analyzing cast of mul and select. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53151 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-05 21:19:34 +00:00
Chris Lattner
aa0bf52625 Fix PR2488, a case where we deleted stack restores too aggressively. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52702 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-25 05:59:28 +00:00
Eli Friedman
5c1f172213 Fix for PR2479: correctly optimize expressions like (a > 13) & (a == 
15).

See also PR1800, which is about the signed case.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52608 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 23:36:13 +00:00
Chris Lattner
2de3fec61c Fix PR2471, which is a bug involving an invalid promotion from a conditional load. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52525 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-20 05:12:56 +00:00
Chris Lattner
0521e3cdc1 implement some simple bswap optimizations, rdar://5992453 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52442 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-18 04:33:20 +00:00
Chris Lattner
8114b718c9 make truncate/sext elimination capable of changing phi's. This 
implements rdar://6013816 and the testcase in Transforms/InstCombine/sext-misc.ll.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52440 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-18 04:00:49 +00:00
Matthijs Kooijman
d47e6aeb93 Make testcase check for extractvalue instead of extractelement. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52317 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-16 13:03:44 +00:00
Eli Friedman
6100119620 Remove unnecessary target lines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52261 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-13 22:12:16 +00:00
Eli Friedman
6783cdcbd2 Remove unnecessary target lines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52260 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-13 22:10:32 +00:00
Eli Friedman
6903a24f32 Don't skip over instructions other than loads that might read memory 
when trying to sink stores.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52259 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-13 22:02:12 +00:00
Eli Friedman
66fe80aa57 Make sure SimplifyStoreAtEndOfBlock doesn't mess with loops; the 
structure checks are incorrect if the blocks aren't distinct.
Fixes PR2435.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52257 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-13 21:17:49 +00:00
Matthijs Kooijman
a9012eca1a Teach instruction combining about the extractvalue. It can succesfully fold 
useless insert-extract chains, similar to how it folds them for vectors.

Add a testcase for this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52217 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-11 14:05:05 +00:00
Matthijs Kooijman
61d858e3f0 Ignore stderr for some more tests that expect warnings there. 
This fixes 2 testcases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52184 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-10 16:13:38 +00:00
Dan Gohman
9eb698b96d Fix two more not-grep tests that were missing llvm-dis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52159 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-09 22:36:45 +00:00
Chris Lattner
7d8ab4efbc Limit the icmp+phi merging optimization to the cases where it is profitable: 
don't make i1 phis when it won't be possible to eliminate them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52097 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-08 20:52:11 +00:00
Zhou Sheng
b73afcf6dc Add a test case for opt -instcombine bug fix in revision 52003. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52004 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-05 14:25:11 +00:00
Duncan Sands
f413cdfb0b When simplifying a call to a bitcast function, tighten up 
the conditions for performing the transform when only the
function declaration is available: no longer allow turning
i32 into i64 for example.  Only allow changing between
pointer types, and between pointer types and integers of
the same size.  For return values ptr -> intptr was already
allowed; I added ptr -> ptr and intptr -> ptr while there.
As shown by a recent objc testcase, changing the way
parameters/return values are passed can be fatal when calling
code written in assembler that directly manipulates call
arguments and return values unless the transform has no
impact on the way they are passed at the codegen level.
While it is possible to imagine an ABI that treats integers
of pointer size differently to pointers, I don't think LLVM
supports any so the transform should now be safe while still
being useful.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51834 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-01 07:38:42 +00:00
Nick Lewycky
517e1f5cd7 Peer through sext/zext when looking for not(cmp). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51819 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-31 19:01:33 +00:00
Nick Lewycky
9419ddb289 Add more i1 optimizations. add, sub, mul, s/udiv on i1 are now simplified away. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51817 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-31 17:59:52 +00:00
Nick Lewycky
fd12a0b20b Adding i1 is always Xor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51816 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-31 17:10:28 +00:00
Chris Lattner
a935db8ea2 Implement PR2370: memmove(x,x,size) -> noop. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51636 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-28 05:30:41 +00:00
Nick Lewycky
3dfd7bf511 "ret (constexpr)" can't be folded into a Constant. Add a method to 
Analysis/ConstantFolding to fold ConstantExpr's, then make instcombine use it
to try to use targetdata to fold constant expressions on void instructions.

Also extend the icmp(inttoptr, inttoptr) folding to handle the case where
int size != ptr size.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51559 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-25 20:56:15 +00:00
Chris Lattner
393f7eb60a Fix a serious brain-o. Obviously no-one reviewed my patch :( 
This fixes PR2359


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51536 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-24 04:06:28 +00:00
Nick Lewycky
18b3da6c34 Constant integer vectors may also be negated. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51476 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-23 04:54:45 +00:00
Nick Lewycky
02d639fcc0 Revert X + X --> X * 2 optz'n which pessimizes heavily on x86. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51474 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-23 04:34:58 +00:00
Nick Lewycky
8539fe26b7 Implement X + X for vectors. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51472 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-23 04:14:51 +00:00
Nick Lewycky
39ac3b57bc Fix a recently added optimization to not crash on vectors. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51471 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-23 03:26:47 +00:00
Dan Gohman
a332f17c8c Generalize the new code in instcombine's ComputeNumSignBits for handling 
and/or to handle more cases (such as this add-sitofp.ll testcase), and
port it to selectiondag's ComputeNumSignBits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51469 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-23 02:28:01 +00:00
Gabor Greif
5edf210bdf Eliminate questionable syntax for stdin redirection. This probably also speeds things up a bit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51357 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-20 22:07:21 +00:00
Dan Gohman
7a9708b984 Oops, commit the version of this test that actually works. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51351 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-20 21:19:36 +00:00
Dan Gohman
f35c8822a3 Port SelectionDAG's ComputeNumSignBits-using code to instcombine, 
now that instcombine also has ComputeNumSignBits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51350 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-20 21:01:12 +00:00
Gabor Greif
f6cadc440c sabre brings to my attention that the 'tr' suffix is also obsolete 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51349 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-20 21:00:03 +00:00
Gabor Greif
722243bd40 Rename the last test with .llx extension to .ll, resolve duplicate test by renaming to isnan2. Now that no test has llx ending there is no need to search for them from dg.exp too. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51328 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-20 19:52:04 +00:00
Chris Lattner
3d28b1b35b Teach instcombine 4 new xforms: 
(add (sext x), cst) --> (sext (add x, cst'))
  (add (sext x), (sext y)) --> (sext (add int x, y))
  (add double (sitofp x), fpcst) --> (sitofp (add int x, intcst))
  (add double (sitofp x), (sitofp y)) --> (sitofp (add int x, y))

This generally reduces conversions.  For example MiBench/telecomm-gsm
gets these simplifications:

HACK2: 	%tmp67.i142.i.i = sext i16 %tmp6.i141.i.i to i32		; <i32> [#uses=1]
	%tmp23.i139.i.i = sext i16 %tmp2.i138.i.i to i32		; <i32> [#uses=1]
	%tmp8.i143.i.i = add i32 %tmp67.i142.i.i, %tmp23.i139.i.i		; <i32> [#uses=3]
HACK2: 	%tmp67.i121.i.i = sext i16 %tmp6.i120.i.i to i32		; <i32> [#uses=1]
	%tmp23.i118.i.i = sext i16 %tmp2.i117.i.i to i32		; <i32> [#uses=1]
	%tmp8.i122.i.i = add i32 %tmp67.i121.i.i, %tmp23.i118.i.i		; <i32> [#uses=3]
HACK2: 	%tmp67.i.i190.i = sext i16 %tmp6.i.i189.i to i32		; <i32> [#uses=1]
	%tmp23.i.i187.i = sext i16 %tmp2.i.i186.i to i32		; <i32> [#uses=1]
	%tmp8.i.i191.i = add i32 %tmp67.i.i190.i, %tmp23.i.i187.i		; <i32> [#uses=3]
HACK2: 	%tmp67.i173.i.i.i = sext i16 %tmp6.i172.i.i.i to i32		; <i32> [#uses=1]
	%tmp23.i170.i.i.i = sext i16 %tmp2.i169.i.i.i to i32		; <i32> [#uses=1]
	%tmp8.i174.i.i.i = add i32 %tmp67.i173.i.i.i, %tmp23.i170.i.i.i		; <i32> [#uses=3]
HACK2: 	%tmp67.i152.i.i.i = sext i16 %tmp6.i151.i.i.i to i32		; <i32> [#uses=1]
	%tmp23.i149.i.i.i = sext i16 %tmp2.i148.i.i.i to i32		; <i32> [#uses=1]
	%tmp8.i153.i.i.i = add i32 %tmp67.i152.i.i.i, %tmp23.i149.i.i.i		; <i32> [#uses=3]
HACK2: 	%tmp67.i.i.i.i = sext i16 %tmp6.i.i.i.i to i32		; <i32> [#uses=1]
	%tmp23.i.i5.i.i = sext i16 %tmp2.i.i.i.i to i32		; <i32> [#uses=1]
	%tmp8.i.i7.i.i = add i32 %tmp67.i.i.i.i, %tmp23.i.i5.i.i		; <i32> [#uses=3]


This also fixes a bug in ComputeNumSignBits handling select and
makes it more aggressive with and/or.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51302 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-20 05:46:13 +00:00
Chris Lattner
0c7a9a04e7 convert fptosi(sitofp x) -> x if the fp value has enough bits in its mantissa 
to accurately represent the integer.  This triggers 9 times in 471.omnetpp,
though 8 of those seem to be inlined from the same place.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51271 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-19 20:25:04 +00:00